HP is going for the laptop top spot. And it wants it by the end of the year, say company execs.

In particular, HP will be targeting IBM's notebook customers as its business is gradually shifted to Chinese company Lenovo.

"The IBM/Lenovo announcement is a great opportunity for HP. We want to reclaim the worldwide number one position in market share for HP notebooks," said Ted Clark, general manager of HP's mobile computing.

And so comes the launch of new products in five different categories of business notebooks - the largest notebook launch in the company's history. The new systems range from lightweight notebooks to full-featured desktop replacements.

IBM's sale of its PC division in December to Lenovo for $1.25 billion has caused IBM customers to openly question their relationship with the company, HP claims. Or hopes at least.

"Every time there is disruption in the marketplace, it creates opportunities," said Margaret Franco, business notebook marketing director.

HP needs to capitalise on those opportunities with products that offer business customers more than just the advances in mobile technology delivered by Intel, which almost all notebook companies will also adopt, said Dan Forlenza, another mobile computing vice president.

The new notebooks emphasise reliability and ease of use. Docking stations that offer one-button release and make it easier to connect notebooks than with previous models, Forlenza said.

All the new PCs will be available by the end of March, with a few available immediately.